body {
    background-color: black;
    animation: fadein ease-in .5s;
}

@keyframes fadein {
    from{
        opacity: 0%;
    }
    to {
        opacity: 100%;
    }
}

* {
    box-sizing: border-box;
}

.column {
    /*float: left;*/
    width: 50%;
    padding: 10px;
}

.bg-column {
    /*float: left;*/
    width: 50%;
    padding: 10px;
}

.square {
    content: "";
    display: flex;
    clear: both;
    position: absolute;
    z-index: 2;
    flex-direction: row;
}

.background {
    display: flex;
    flex-direction: row;
    position: absolute;
    height: 100vh;
    width: 100%;
}

.hiki-graphic {
    margin-top: 14%;
    padding-left: 17%;
}

.hiki-graphic img {
    width: 80%;
    transition: transform 250ms;
    display: inline-block;
    -webkit-transform: scale(1.0);
    -moz-transform: scale(1.0);
    -o-transform: scale(1.0);
    transform: scale(1.0);

}

.hiki-graphic img:hover {
    display: inline-block;
    -webkit-transform: scale(1.5);
    -moz-transform: scale(1.5);
    -o-transform: scale(1.5);
    transform: scale(1.5);
}

.cyb-graphic {
    margin-top: 14%;
    padding-left: 17%;
}

.cyb-graphic img {
    width: 80%;
    transition: transform 250ms;
    display: inline-block;
    transform:scale(1.0);
}

.cyb-graphic img:hover {
    -moz-transform:scale(1.0);
    transform:scale(1.0);
    -webkit-transform:scale(1.5);
    -o-transform:scale(1.0);
}

.cyb-graphic img:hover {
    display: inline-block;
   -webkit-transform: scale(1.5);
   -moz-transform: scale(1.5);
   -o-transform: scale(1.5);
   transform: scale(1.5);
}

.hiki-bg img {
    /*position: absolute;
    left: 0px;
    top: 0px;
    z-index: 0;
    width: 100%;
    height: 100vh;*/
    filter: brightness(0.4);
    width:100%;
    height: 100vh;
}

.cyb-bg img {
    /*position:absolute;
    right: -900px;
    top: 0px;
    z-index: 0;
    width: 100vh;
    height: 100vh;*/
    filter: brightness(0.4);
    width:100%;
    height: 100vh;

}

p {
    position: absolute;
    bottom: -5px;
    right: 10px;
    font-size:15px;
    font-family: 'Noto Sans JP', sans-serif;
    color: white;
}

@media screen and (max-width:800px){

    .column {
        /*float: left;*/
        width: 80%;
        padding: 10px;
    }

    .square {
        display: flex;
        clear: both;
        position: absolute;
        z-index: 2;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100%;
    }

    .hiki-graphic {
        margin-top:50%;
    }

    .hiki-graphic img {
        width: 80%;
        display: inline-block;
    }

    .cyb-graphic {
        margin-bottom:50%;
    }

    .cyb-graphic img {
        width: 80%;
        display: inline-block;
    }

    .background {
        display: flex;
        position: relative;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 0;
        width: 100%;
        height: 100%;
    }

    .bg-column {
        width: 100%;
        height: 50%
    }

    .hiki-bg{
        margin-top:-50%;
        height: 100%
    }

    .hiki-bg img{
        width: 100%;
        display: inline-block;
    }

    .cyb-bg {
        margin-top: 0%;
    }

    .cyb-bg img{
        width: 100%;
        display: inline-block;
        height: 100%
    }
}

@media screen and (max-width:480px){

    .column {
        /*float: left;*/
        width: 80%;
        height: 50%;
        padding: 10px;
    }

    .square {
        display: flex;
        clear: both;
        position: absolute;
        z-index: 2;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100%;
    }

    .hiki-graphic {
        margin-top: 50%
    }

    .hiki-graphic img {
        width: 80%;
        display: inline-block;
    }

    .cyb-graphic {
        margin-top: 20%;
    }

    .cyb-graphic img {
        width: 80%;
        display: inline-block;
    }

    .background {
        display: flex;
        position: relative;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 0;
        width: 100%;
        height: 100%;
    }

    .bg-column {
        width: 100%;
        height: 50%
    }

    .hiki-bg{
        margin-top:-50%;
        height: 100%
    }

    .hiki-bg img{
        width: 100%;
        display: inline-block;
    }

    .cyb-bg {
        margin-top: 0%;
    }

    .cyb-bg img{
        width: 100%;
        display: inline-block;
        height: 100%
    }
}